Are the books still available?

I've been a fan of the original Carlito's Way(Al Pacino version) for years and I also own a copy of "Rise To Power" as well. But I would love to find copies of both the novels Carlito's Way and After Hours for which both movies were based on. Does anybody know if the the books are still available? And if so, where can they be purchased at? If anybody knows, please send some feedback whenever possible. Thank you.